EDIT: Ah, great. I restored my vehicles.img file and got the game working again. :) So far, so good, so please disregard the below!
Thanks all for the help. I was able to get most of the lights working with ELS v7, though the lights themselves don't generally look as good as they do in the trailers / screen shots. Also, shift works, too. I'm able to make traffic stops, etc. now while in the cruiser.
I downloaded the Mass State Police CVPI and using OpenIV in edit mode, replaced the two police files. I then opened the game back up and as soon as the game loads and I'm in Niko's apartment, it crashes and says, "GTA IV FATAL ERROR: Invalid resource detected - Please re-install the game."
I'm assuming it is related to the vehicles file, but I tried swapping the two police car files with others I downloaded and the same thing. I even tried deleting the two of them so it wasn't loading it at all. I know I can re-install the game, but it takes like 45 minutes to do so, so I'd rather not if it's going to just happen again when I add more cars. I've attached my debugging information below:
BEGIN *SIGNED* LCPD First Response Issue Report
Diagnostics Tool Version: 0.4.3
Operating system: Windows7 HomePremium (6.1.1.0 Build: 7601) Service Pack:Service Pack 1
System RAM (GB): 5.9
CPU cores: 8
NET Framework 4.0 installed: True
Visual C++ 2010 Redistributable installed: True
GTA IV - Installed: True
GTA IV - Install folder: C:Program Files (x86)Rockstar GamesGrand Theft Auto IV
GTA IV - Version: 1, 0, 7, 0
GTA IV - Asi loader installed: True
GTA IV - Asi loader: DSOUND
GTA IV - Asi loader valid: True
GTA IV - C++ ScriptHook installed: True
GTA IV - C++ ScriptHook valid: True
GTA IV - C++ ScriptHook version: 0, 5, 1, 0
GTA IV - ScriptHookDotNet installed: True
GTA IV - ScriptHookDotNet valid: True
===============BEGIN .NET SCRIPTHOOK LOG===============
2013-06-29 12:08:32 - Initializing ScriptHookDotNet v1.7.1.4 BETA (GTA IV version 1.0.7.0)
2013-06-29 12:09:24 - Direct3D device created!
2013-06-29 12:09:24 - SEARCHING FOR SCRIPTS...
2013-06-29 12:09:24 - Loading scripts in Assembly 'scriptsFirstResponse.net.dll' ...
2013-06-29 12:09:24 - ...found script 'FirstResponse.Main.EmergencyLights'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.Main.Start'!
2013-06-29 12:09:24 - ...found script 'CSharp.Engine.Core'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.Debugging'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.DeletionList'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.Hardcore'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.TextDraw'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCMD.Main'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCMD.Functions'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Carboot'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Disarm'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Frisk'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.PullOver'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Actions'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Debug'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Flashlight'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Functions'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Partner'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.inputSimulator'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Start'!
2013-06-29 12:09:24 - ...found script 'FirstResponse.LCPD.Various'!
2013-06-29 12:09:24 - Loading scripts in Assembly 'scriptsPolicing.net.dll' ...
2013-06-29 12:09:24 - ...found script 'Policing.Policing'!
2013-06-29 12:09:24 - ...found script 'Policing_Breathalyser.Policing_Breathalyser'!
2013-06-29 12:09:24 - ...found script 'Policing_Resist.Policing_Resist'!
2013-06-29 12:09:24 - Loading scripts in Assembly 'scriptsRadar.net.dll' ...
2013-06-29 12:09:24 - ...found script 'TestScriptVB.RadarScript'!
2013-06-29 12:09:24 - DONE! 25 valid scripts found!
2013-06-29 12:09:24 - STARTING SCRIPTS...
2013-06-29 12:09:24 - Error during GetPhoneNumber (Phone checks will be disabled):
System.Exception: Accessing Globals failed! Invalid Memory Address!
at unmanaged.MemoryAccess.GetGlobalAddress(Int32 index)
at unmanaged.MemoryAccess.GetPhoneNumber()
at GTA.NetHook.CheckPhone()
2013-06-29 12:09:24 - ...successfully started script 'TestScriptVB.RadarScript'!
2013-06-29 12:09:24 - ...successfully started script 'Policing_Resist.Policing_Resist'!
2013-06-29 12:09:24 - ...successfully started script 'Policing_Breathalyser.Policing_Breathalyser'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Various'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Start'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.inputSimulator'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Partner'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Functions'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Flashlight'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Debug'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Actions'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.PullOver'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Frisk'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Disarm'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCPD.Carboot'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCMD.Functions'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.LCMD.Main'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.TextDraw'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.Hardcore'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.DeletionList'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.Debugging'!
2013-06-29 12:09:24 - ...successfully started script 'CSharp.Engine.Core'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.Main.Start'!
2013-06-29 12:09:24 - ...successfully started script 'FirstResponse.Main.EmergencyLights'!
===============END .NET SCRIPTHOOK LOG===============
End of *SIGNED* LCPD First Response Issue Report
Digital signature: srduiktGrLuVxkAVsazJIA==
Thanks again